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Implement site create RPC. Now tricircle api can utilize RPC to notify cascade service to start rpc server for new site. Partially implements: blueprint implement-api Ref: https://blueprints.launchpad.net/tricircle/+spec/implement-api Change-Id: I73879a84d31b5ac9004cfe3f18cb9a984d53099cchanges/60/247960/3
zhiyuan_cai
7 years ago
22 changed files with 250 additions and 186 deletions
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# Copyright 2015 Huawei Technologies Co., Ltd. |
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# |
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# Licensed under the Apache License, Version 2.0 (the "License"); |
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# you may not use this file except in compliance with the License. |
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# You may obtain a copy of the License at |
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# |
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# http://www.apache.org/licenses/LICENSE-2.0 |
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# |
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# Unless required by applicable law or agreed to in writing, software |
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# distributed under the License is distributed on an "AS IS" BASIS, |
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or |
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# implied. |
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# See the License for the specific language governing permissions and |
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# limitations under the License. |
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from socket import gethostname |
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from oslo_config import cfg |
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from nova import exception |
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from nova import objects |
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from nova.scheduler import driver |
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from nova.scheduler.manager import SchedulerManager |
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from tricircle.common.utils import get_import_path |
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from tricircle.cascade_service import site_manager |
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from tricircle.cascade_service.compute import NovaService |
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cfg.CONF.import_opt('scheduler_topic', 'nova.scheduler.rpcapi') |
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_REPORT_INTERVAL = 30 |
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_REPORT_INTERVAL_MAX = 60 |
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def _get_import_path(klass): |
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return "%s.%s" % (klass.__module__, klass.__name__) |
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def create_server(): |
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return NovaService( |
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host=gethostname(), |
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binary="nova-scheduler", |
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topic="scheduler", # TODO(saggi): get from conf |
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db_allowed=False, |
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periodic_enable=True, |
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report_interval=_REPORT_INTERVAL, |
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periodic_interval_max=_REPORT_INTERVAL_MAX, |
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manager=get_import_path(SchedulerManager), |
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scheduler_driver=get_import_path(TricircleSchedulerDriver), |
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) |
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class _AvailabilityZone(object): |
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def __init__(self, name, host_manager): |
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self.name = name |
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self._host_manager = host_manager |
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self._site_manager = site_manager.get_instance() |
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@property |
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def host_aggregates(self): |
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for aggregate in self._host_manager.aggregates: |
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if aggregate.metadata[u'availability_zone'] == self.name: |
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yield aggregate |
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@property |
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def member_hosts(self): |
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for aggregate in self.host_aggregates: |
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for host in aggregate.hosts: |
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yield host |
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@property |
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def valid_sites(self): |
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for host in self.member_hosts: |
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yield self._site_manager.get_site(host) |
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class _HostManager(object): |
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def __init__(self): |
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self.aggregates = [] |
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# Required methods from OpenStack interface |
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def update_aggregates(self, aggregates): |
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# This is not called reliably enough to trust |
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# we just reload the aggregates on every call |
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pass |
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def delete_aggregate(self, aggregate): |
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# This is not called reliably enough to trust |
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# we just reload the aggregates on every call |
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pass |
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def update_instance_info(self, context, host_name, instance_info): |
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pass |
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def delete_instance_info(self, context, host_name, instance_uuid): |
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pass |
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def sync_instance_info(self, context, host_name, instance_uuids): |
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pass |
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# Tricircle only methods |
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def get_availability_zone(self, az_name): |
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return _AvailabilityZone(az_name, self) |
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def reload_aggregates(self, context): |
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self.aggregates = objects.AggregateList.get_all(context) |
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class TricircleSchedulerDriver(driver.Scheduler): |
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def __init__(self): |
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super(TricircleSchedulerDriver, self).__init__() |
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self.host_manager = _HostManager() |
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self._site_manager = site_manager.get_instance() |
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def select_destinations(self, ctxt, request_spec, filter_properties): |
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self.host_manager.reload_aggregates(ctxt) |
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availability_zone = self.host_manager.get_availability_zone( |
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request_spec[u'instance_properties'][u'availability_zone']) |
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for site in availability_zone.valid_sites: |
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site.prepare_for_instance(request_spec, filter_properties) |
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return [{ |
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'host': site.name, |
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'nodename': site.get_nodes()[0].hypervisor_hostname, |
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'limits': None, |
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}] |
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else: |
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raise exception.NoValidHost( |
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"No sites match requested availability zone") |
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@ -0,0 +1,50 @@
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# Copyright 2015 Huawei Technologies Co., Ltd. |
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# |
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# Licensed under the Apache License, Version 2.0 (the "License"); |
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# you may not use this file except in compliance with the License. |
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# You may obtain a copy of the License at |
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# |
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# http://www.apache.org/licenses/LICENSE-2.0 |
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# |
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# Unless required by applicable law or agreed to in writing, software |
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# distributed under the License is distributed on an "AS IS" BASIS, |
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or |
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# implied. |
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# See the License for the specific language governing permissions and |
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# limitations under the License. |
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from oslo_log import log as logging |
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import oslo_messaging |
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from tricircle.common import rpc |
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from tricircle.common import topics |
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LOG = logging.getLogger(__name__) |
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class CascadingSiteNotifyAPI(object): |
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"""API for to notify Cascading service for the site API.""" |
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def __init__(self, topic=topics.CASCADING_SERVICE): |
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target = oslo_messaging.Target(topic=topic, |
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exchange="tricircle", |
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namespace="site", |
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version='1.0', |
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fanout=True) |
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self.client = rpc.create_client(target) |
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def _cast_message(self, context, method, payload): |
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"""Cast the payload to the running cascading service instances.""" |
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cctx = self.client.prepare() |
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LOG.debug('Fanout notify at %(topic)s.%(namespace)s the message ' |
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'%(method)s for CascadingSite. payload: %(payload)s', |
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{'topic': cctx.target.topic, |
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'namespace': cctx.target.namespace, |
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'payload': payload, |
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'method': method}) |
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cctx.cast(context, method, payload=payload) |
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def create_site(self, context, site_name): |
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self._cast_message(context, "create_site", site_name) |
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@ -0,0 +1,32 @@
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# Copyright 2015 Huawei Technologies Co., Ltd. |
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# |
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# Licensed under the Apache License, Version 2.0 (the "License"); |
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# you may not use this file except in compliance with the License. |
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# You may obtain a copy of the License at |
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# |
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# http://www.apache.org/licenses/LICENSE-2.0 |
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# |
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# Unless required by applicable law or agreed to in writing, software |
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# distributed under the License is distributed on an "AS IS" BASIS, |
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or |
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# implied. |
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# See the License for the specific language governing permissions and |
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# limitations under the License. |
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import oslo_messaging |
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from oslo_log import log as logging |
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from tricircle.dispatcher import site_manager |
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LOG = logging.getLogger(__name__) |
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class CascadeSiteServiceEndpoint(object): |
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target = oslo_messaging.Target(namespace="site", |
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version='1.0') |
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def create_site(self, ctx, payload): |
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site_manager.get_instance().create_site(ctx, payload) |
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